患者孙某,女,30岁。因左足跟底部包块20个月,于1982年12月3日入院。患者于1981年5月,无意中感到走路时左足跟底有异物顶压疼痛,发现跟底软组织内有一花生米大小之硬块,能活动。包块逐渐增大,走路疼痛加重。1982年8月在当地医院拍x线片检查曾诊断为“软组织钙化”,“骨化性肌炎”。入院检查: The patient Sun Mou, female, is 30 years old. He was admitted to the hospital on December 3, 1982, because his left foot had a mass at the bottom for 20 months. In May 1981, the patient inadvertently felt that the left foot had a foreign body pressing on top of the pain when he walked, and found that there was a peanut-sized hard block inside the underlying soft tissue that could move. The masses gradually increased and the pain in walking increased. In August 1982, an X-ray examination was performed at a local hospital and was diagnosed as “soft tissue calcification” and “ossification myositis.” Admission check: